Heat oven to 350F Butter a large casserole dish.,In a large saucepan, over medium-high heat, bring 3 cups of the milk to a boil.,______,Whisking constantly, slowly add the mixture to the boiling milk.,Reduce heat and simmer gently, stirring frequently for 15 minutes.,Remove from heat.,Stir in molasses, butter, brown sugar, salt, ginger, cinnamon, nutmeg and vanilla.,Transfer mixture to the prepared casserole dish.,Set the casserole in a roasting pan, pull the oven rack out halfway, and place the pan on it.,Carefully add enough hot water to the pan to reach halfway up the casserole.,Cover with foil.,Bake for 1 hour, remoge the foil and bake for another 90 minutes.,Transfer to a wire rack for at least 30 minutes.,Serve with whipping cream.